killer whale

noun

: a relatively small toothed whale (Orcinus orca of the family Delphinidae) that is black above with white underparts and white oval-shaped patches behind the eyes, attains a length of 20 to 30 feet (6 to 9 meters), typically hunts in groups, and preys chiefly on sea mammals (such as seals, sea lions, and other whales), large fish, and squid

called also orca

Examples of killer whale in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Billy and Tina are not the first giant mammals removed from L.A. under cover of darkness In 1987, Marineland of the Pacific, a theme park on the Palos Verdes Peninsula, trucked two killer whales, Corky and Orky, to SeaWorld in San Diego in the middle of the night under police escort. Hailey Branson-Potts, Los Angeles Times, 23 May 2025 That could include chemical-intensive lab work like testing sea lions, killer whales, and walruses from Alaska for environmental contaminants, Tolimieri said. Ryan Whitwam, ArsTechnica, 14 Apr. 2025 Whales are also everywhere, and travelers might see killer whales, humpbacks, fins, and blue whales. Judy Koutsky, Forbes.com, 29 Mar. 2025 Population growth is limited by nutritional impacts on pregnancy success in endangered Southern Resident killer whales (Orcinus orca) Science News. Joshua Rapp Learn, Discover Magazine, 27 Mar. 2025 See All Example Sentences for killer whale

Word History

First Known Use

1884, in the meaning defined above

Time Traveler
The first known use of killer whale was in 1884

Browse Nearby Words

Cite this Entry

“Killer whale.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/killer%20whale. Accessed 6 Jun. 2025.

Kids Definition

killer whale

noun
kill·​er whale
ˈkil-ər-
: a flesh-eating mostly black toothed whale 20 to 30 feet (about 6 to 9 meters) long that travels in groups

More from Merriam-Webster on killer whale

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!